-L[efos]
Specify where logging output should be directed (standard error or output, to a file or via syslog). See LOGGING OPTIONS in snmpcmd(5) for details.

man snmpcmd

-L [eEfFoOsS]
Specifies output logging options. See LOGGING OPTIONS below.
-Ls FACILITY
Log messages via syslog, using the specified facility (’d’ for LOG_DAEMON, ’u’ for LOG_USER, or ’0’-’7’ for LOG_LOCAL0 through LOG_LOCAL7).
There are also "upper case" versions of each of these options, which allow the corresponding logging mechanism to be restricted to certain priorities of message. Using standard error logging as an example:
For -LF and -LS the priority specification comes before the file or facility token. The priorities recognised are:
0 or ! for LOG_EMERG,
1 or a for LOG_ALERT,
2 or c for LOG_CRIT,
3 or e for LOG_ERR,
4 or w for LOG_WARNING,
5 or n for LOG_NOTICE,
6 or i for LOG_INFO, and
7 or d for LOG_DEBUG.